Return to the thumbnail page Display/hide file information See previous file See next file

Lithonia 42w PL lamp

Lithonia 42w PL lamp

Click to view full size image

Normally I wouldnt post a modern chinese-made PL lamp, but these are interesting as they exhibit that unusual phenomenon in which one section of the tube glows a very dim pink color, while the other two sections run at full intensity and color. While ive seen this issue in many triple and quad tube PL lamps (of all brands) over the years, these Lithonia branded lamps we installed a little over two years ago in a few branches of a community bank are beginning to do this, and bad. They're all in recessed cans running base up. The light output has diminished by 1/3 due to this issue. Anybody have an idea what causes this? It looks like bad mercury starvation, but I truly dont believe thats whats happening here, since these lamps are not amalgam and have large beads of mercury inside the tube.

20190314_215620.jpg 20190325_170032.jpg 20190313_180300.jpg 20190213_192950.jpg

File information

File information

Download: Download this File
Album name:BlueHalide / New album
File Size:454 KB
Date added:Mar 13, 2019
Dimensions:2464 x 1848 pixels
Displayed:64 times
Date Time:2019:03:13 18:03:00
DateTime Original:2019:03:13 18:03:00
Exposure Bias:0 EV
Exposure Time:1/60 sec
FNumber:f 1.7
Flash:No Flash
Focal length:4.25 mm
White Balance:0
Favorites:Add to Favorites
Sr. Member

Posts: 371
View Gallery

View Profile Personal Message (Offline)
Mar 13, 2019 at 08:24 PM Author: BlueHalide
Also worth noting, just like many other Lithonia products, the branding is only on the packaging, not the lamp itself, as you can see here.
Full Member

Posts: 174
View Gallery

View Profile Personal Message (Offline)
Mar 14, 2019 at 06:45 PM Author: arcblue
I really would like to know too...I have seen the phenomena in many 3-U lamps where one U is dim, pink or even appears to be dead but the other Us are lit at normal brightness. I believe the ones I saw were Sylvania and they may have been a lower wattage than 42.

I'm lampin...

© 2005-2019 | Powered by: Coppermine Photo Gallery